Barber&#39;s chair.



` J. H; WBRTZ &f P. ROMERNAGKL y BARBERS CHAIR.

APPLICATION FILED LPRA, 1911.

Patented May 21, 1912.

2 SHEIITS-SHEET 1.

fr) Ven'cr's:

` J. H. WERTZ & F. POMERNACKI.

BARBERS CHAIR. APPLICATION FILED APRA, 1911.

.2 SHEETS-SHEET 2.

1,027,364. i Patented May 21, 1912.

UNITED STATES PATENT OFFICE.

JOSEPH H. wnn'rz AND' FRANK POME'RNACKI, or' CHICAGO, ILLINOIS,AssIGNons 'ro' Y* p THEO, A. KOCHS CO., 'OF GHICnCO, ILLINOIS, 'ACORPORATION OF ILLINOIS.

BARBERS CHnIm Specification of Letters Patent.

41p1-ligation mea .april 4, 1911. serial No. 618,832. l

To all whom it may concern:

Beit known that we, `JOSEPH H. WERTZ,

a citizen of the UnitedStates, and FRANK POMERNACKI, a subject of thevEmperor of Russia, both residin at Chicago, in the county of Cook andtate of Illinois, have invented certain new and useful 4Improvements inBarbers Chairs, of which the following is aspecication.

The present invention relates more particularly to the lookin memberused for locking the chair agalnst rotative movement.

The primary object of the invention. is to provlde a locking memberwhich can be made operative at an time desired during the raising andlowering of the chair body.

Another object o f the invention is to provide a locking member whichwill be operated with a canting movement, thus 'throwlng a portion ofitinto a bitingv engagement with a fixed surface lto effect the lockingoperation. y

A further object of the invention is to provide a locking member whichwill normally be held by gravit out of locking position. And a stillfurt er objectof the invent-ionl is to perform this canting operation bya greater than normal movement of a portion of the pump mechanism.

This invent-ion further relates tothe features of construction and tothe combination of parts hereinafter described and claimed. In thedrawings, Figure 1 is a sectional view of the base of a barbers chair,showing thepump mechanism and the locking mechaber and piston, andshowing the members on the pitman which engage the locking member toeffect the locking operation; Fig. 5, a perspective of the lockingmemberof the present invent-ion; and Fig. 6, a section on line 6-6 ofFig. 4, looking in the direc' tin of the arrow. f

The lock of the present invention is ap-` pliedto' that type of chaircommonly termedV shown in the drawings form no portion of the presentinvention and are merely shown for illustrative purposes, so it is otdeemed necessary to describe these parts etail.

The base portion 7 lis attached to a cylinder 8 by any suitablefastening means, and the cylinderS incloses a piston 9, which terminatesin .an enlarged hollow head 1.0, to which is secured the v seat of thechair. The piston 9 has therein a plunger 11, tovwhich is connected apit-man 12 fastened toa crank arm 13 mounted upon a shaft 14. Theplunger is providedrwith a check valve 15, and the piston is provided.with a check valve 16. The construction and method of operation of`these parts are noty deemed to have any bearing on the `presentinvention any more than the manner in which they may be formed toreceive and actuate the locking means set forth in the annexed claims;and, moreover, `these parts' are generally described in the LettersPatent to Pfanschmidt and Schwarzkopf heretofore mentioned.

The locking mechanism which constitutes the present invention consistsof a body portion 17, from which extend companion arms 18 spaced awayfrom lone another. The slot 19 intermediate the arms 18 is of a size topermit the entrance therebetween of the stem 20 of the pitman 12. Thisconstruct-ion may be described as a locking member with a bifurcated endwhich provides arms adapted to lie upon opposite sides of the stem ofthe pitman. It will be noted that the arms 18 are, as shown, curvilinearin format-ion, and that they overlie yoppositely extending pins orcontacts 21 lugs 22, which, as shown, are provided with a curved surface23. These lugs are seated within recesses 24 formed in the side wall ofthe piston, and the recesses are of a curved PafentedMayaI, 1912.v

. formation, corresponding to the curvature provided within the walls ofthe piston.

The recesses 24 communicate with an opening 25 in the side wall of thepiston, and through this opening projects the body portion of thelocking member.-

By referring to Fig. 6, it will be seen that the outer face of the bodyportion of the locking member is formed wit-h a curvaturev The operationof the device is as follows :k

When it is desired to raise or lower the chair, the shaft 14 is actuatedby a suitable handle (not shown), and the` crank arm 13 is swung tooperate the pitman 12, to raise or lower theplunger 11, whereby, throughtheoperation of the check valves, fluid is either forced under orexhausted from beneath the piston and the piston raised or lowered,resulting in the raising or lowering of the chair seat. This pumpingoperation isold and well known in the art and is fully and clearlydescribed in the Pfanschmidt and Schwarzkopf patentl heretofore reVferred to.

The operation of the locking mechanism, which :forms the feature of the'present invention, is as follows When the stem 20 ofD the pitman israised a greater degree than is necessary to perform the pumpingoperation, the pins 21 on the pitman stem engage with the curvilineararms 18 and tilt or cant the body port-ion of the locking member aroundthe center of the recesses 24, the lugs 22 turning in' said recesses, aswill 'be obvious. This throws the upper outer end 26 of the body portionof the lockin member into a biting engagement with the wall of thecylinder, which is a fixed y surface with respect to the raising andlowering of the chair body; and thus, by forming a biting engagementwith the said fixed surface, the lockingmember prevents rotary movementof the piston within the cylinder, and hence prevents rotary movement ofthe chair body.

It will, of course, be understood that. the biting engagement referredto is not of a suiciently strong nature to embed the ed e of the lockingmember into the wall of t e cylinder, so that said wall would becomeflaked or mutilated; but is rather intended to convey the idea of asurface impinging against the side of the cylinder by reason o f acanting movement imparted to the locking member.

It will be noted that in the present construction the locking memberisactuated solely by the stem of the pitman, and that the shape or natureof the plunger does not enter into the construction atall; and, 'infact, were itpossible to make the pump without a plunger, the lockingmechanism would be operated equally as Jwell without the use of aplunger, all that is necessary 'to operate the lock being a pitman, apiston, and a cylinder.

By providing the locking member with the arms 18, a weight is afforded,which tends normally to hold the upper edge 26 of the locking member outof engagement ing mechanism, the only means by which the locking can beeffected being the throwing of the lever in a position greater thanrequired to perform the pumping operation. In the barber chair art, ithas been customary to perform the locking operation when the lever is ina substantially vertical position.

From a study of the drawings, it will be seen that at all times, savewhen the contact on the pitman stem is engaging the arms 1S, the lockingmember will be free to rock within its bearings. The engagement of theouter face of the locking member, therefore,

with the sides of the casing during the up and down movementsof thechair will tend to force the upper edge 26 of the locking member awayfrom the side of the piston and maintain it out of locking engagement.This forcing away will, of course, be assisted by the ,weight of thearms 18. But even if the element of gravity did not enter into theoperation, the movement of the piston alone would tend to keep thelocking member out of locking position, save when it was canted by themovement of the piti" man, so as to effect the impinging of the edge 26against the side of the cylinder. It will, of course, be seen that sincethe locking member is carried by the piston, the locking operation canbe performed at any suitable time during the raising or lowering of thechair.

`We claim:

1. In a barbers chair, the combination of pump mechanism, a fluidpressure motor actuated by the pump mechanism for raising and lowerinthe chair, said pump mechanism inclu ing a. pitrnan, a locking memberfor locking the chair against revolution, said locking member beingcarried by a portion of said motor mechanism and actuated by directengagement with the pitinan whenl said pitman is raised a predeteringandA lowering the chair, said pump.

mechanism including a pitman, a rocking locking member, for locking thechair aga-inst revolution, said locking member being mounted in aportion of the motor mechanism and actuated by direct engagement withthe pitman when said pitman is raised a predetermined degree,substantially as described. y

3. In-a barbers chair, the combination of pump mechanism, a fluidpressure motor actuated by the pumpfmechanism for raising and loweringthe chair, said pump mechanism including 'a pitman, -a pivotally.

mounted locking member carried by a portion of the motor mechanism, apredetermined degree of movement ot'- said pitman rocking said lockingmember about its pivotal center and 'throwing it into a bitingengagement with a fixed surface whereby the chair is locked againstlrotative movement, substantially as described.

4. In a barbers chair. the combination of a cylinder, a piston withinthe cylinder, a locking member mounted within the wall ot said piston tohave av rocking movement, said wall having an opening through which saidlocking member projects, and means for canting the locking member tothrow it into a biting engagement with the walls et the cylinder,substantially as described.

5. In a barbers chair, the combination of a cylinder, a piston withinthe c x-'lindena locking member mounted within the wall ot said pistonto have a rocking movement, said wall having an opening through whichsaid piston projects, and means for canting the locking member to throwit into a biting engagement with the walls of the cylinder, said lockingmember being held out of canted position by gravity, substantially asdescribed. G. In a barbers chair, the combination of'.

a cylinder, a piston within the cylinder, a pump piston, a pitmandirectly connected thereto, a locking member mounted in said firstmentioned piston, a Contact on the pitman adapted to engage the lockingmember, whereby upon a predetermined movement cf' the pitman the lockingmember is canted and thrown into a biting engagement with the walls ofthe cylinder,'substantially as described. n

7. In a barbel-s chair, the combination of a cylinder, Aa piston withinthe cylinder, a pump piston, a pitman connected thereto, a lockingmember mounted in said first menmined degree whereby said locking membertioned piston to have a rocking movement,`

a contact on the pit-man adapted `to engage and rock theflocking.member, whereby the locking memberis canted and thrown. into a-bitingengagement with the walls of the cylinder, substantially as described.

8.A In abarbers chair, the combination et a cylinder, a piston withinthe cylinder,` a pump piston, a pitman directly connected thereto, alocking member mounted in said first mentioned piston, an arm extendingfrom the locking member, a contact on' the pitman adapted to engage saidarm when said pitman is moved a predetermined de.

gree, whereby said locking member is canted and thrown into a bitingengagement with the walls of said cylinder, substantially as described.

9. Ina barbers chair, thecombination of a cylinder, a fluid pressurelnotor within the cylinder, including a piston. and pit-man, a lockingmember mounted in said piston and terminating in a bifurcated endadapted to embrace said pitman, and contacts on said pitman adapted toengage said biturcated end when the pitman is moved a predetermineddistance, whereby the locking member is ycanted and thrown'into a bitingengagement with said cylinder, substantially as described.

10; In a barbers chair, the combination of a cylinder. a fluidpressure-motor 7ithin the cylinder, including a pistony and pitman, alocking member mounted in said piston to embrace said pitman, andkcontacts on vsaid )itman ada )ted to en ave said bifurcated end whenthe pitman is moved a predetermined distance, whereby the lockingmemberis canted and thrown into a biting engagement with said cylinder,said locking member being held normally out of canted position by theweight of said end, substantially as described.

11. In a barbers chair, the combination oi a cylinder, a piston withinthe cylinder, a pump piston, a pitman connected thereto, afloekingmembercarried by the rst mentioned piston, oppositely extending curved.

lugs on the locking member, said piston having'curved recesses adaptedto receive said lugs, means for effecting an engagement between saidpitlnan and locking member, a predetermined degree of movement of Ysaidpitman rocking said locking member about said lugs as a pivotal center,whereby it is canted and thrown into a biting engagement .with the wallof said cylinder, substantially as described,

12. In a barbers chair, the combination otra cylinder, a piston withinsaid cylinder, a pump pistoma pitman connectedto said piston', a lockingmember, `oppositely eX- tending curved lugs on the locking member,

BEST AVMLBLE COPY said piston having curved recesses adapted beingnormally held out of canted position, to receive said lugs, means foreecting an substantially as described.

engagement between said pit-man and lock- JOSEPH H WERTZ ing member apredetermined degree of y 5 movement ofsaid pi-tman rocking said lock-FRANK POMERNACKI' ing member, whereby it is canted and Witnesses: throwninto a biting engagement with the ARTHUR SPIELMANN, Wall ofsaid'cylinder, said locking member CHARLES PFANscHMIDr.

